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August 2026 · 6 min read

DIFOT: the supplier scorecard your store is missing

Every store has a supplier that's "a bit flaky." Always a day late. Short on a line every third order. Never bad enough to fire, never good enough to trust. You know exactly who it is.

Here's the problem: you can't prove it. You know it in your gut, but you don't have a number. So the supplier keeps being late, and every time you catch it, you're already firefighting. Stockouts, angry customers, a week eaten chasing one late pallet.

Ops teams have a name for this. DIFOT. Delivered In Full, On Time. Two numbers that turn "a bit flaky" into something you can act on.

What DIFOT actually measures

DIFOT is two things, measured separately.

On time. Did the order arrive when the supplier said it would? Not when you hoped, not when you needed it. When they committed to.

In full. Did it arrive complete? Every line, every quantity, or was something short?

The reason you measure them separately is that they're different problems. A supplier can hit every date but always turn up short. Or always send the full order but never on the day they promised. Both hurt you. Both need a different conversation. And you can't have either conversation while you're working from a feeling.

Why most stores never run it

Because it sounds like something a big company does. Something with a procurement team and a dashboard. A store running off Shopify doesn't think it needs a supplier scorecard.

But you have fewer suppliers than the big company, which means each one matters more. When one of your three suppliers is late, that's a third of your stock. The big company absorbs that. You can't.

The other reason is that it's fiddly. It means recording every order, the promised date, the actual date, the quantity ordered, the quantity received. Most founders do this in their head and call it "I'll remember." Nobody remembers.

The two conversations

An always-late supplier and an always-short supplier are not the same problem, and the fix is different for each.

Late means you can't promise your customers a date. It means stockouts because you can't plan around a supplier who doesn't show up. The fix is usually lead time — build more buffer into the reorder, or find someone who can actually hit a date.

Short means you're paying for stock that never arrives, or scrambling to cover the gap at the last minute. The fix is a different conversation — the order quantities, the terms, or the supplier altogether.

You can't tell which one you've got until you measure both. That's the whole point. DIFOT separates the two problems so you fix the right one, instead of vaguely "sorting out the supplier" and changing nothing.

The sign you need this

You already know it. When a supplier misses a date and you think "again." When you reorder early "just in case." When you're holding extra stock of one line because you don't trust the supplier to deliver it.

That's DIFOT happening in your head, without the number. The number is what lets you act. Renegotiate, reorder earlier, or switch suppliers — with the data to back the decision instead of a story about how they've "always been a bit unreliable."

This is the same supplier pain that shows up in the stock and supplier problem we wrote about. It's the loudest operational leak most stores have, and the one they're least equipped to measure.

What to do next

Start small. Pick your three most important suppliers. For a month, record every order: the promised date, the actual date, what you ordered, what turned up. At the end of the month you'll have two percentages for each supplier.

You'll probably find one supplier is fine and one isn't. You already knew which one. Now you can prove it, and the conversation changes from "you're always late" to "you've been under 80% on time for three months. Here's the number."

That's the difference between a feeling and a fact. Feelings get argued with. Facts get fixed.

Getting the numbers is the hard part for most founders, because it's boring and it has to be done every order. If you'd rather someone else run the scorecard for you, supplier management is one of the plays we run — the tracking, the chasing, the awkward conversations, with a human approval on anything that commits money.